(19)

(11)

EP 3 676 743 A1

(12)

(43) Date of publication: 08.07.2020 Bulletin 2020/28 (21) Application number: 18762601.5 (22) Date of filing: 23.08.2018

(51) International Patent Classification (IPC):  G06F 21/57(2013.01) H04L 29/06(2006.01) H04L 9/32(2006.01) (86) International application number: PCT/GB2018/052393 (87) International publication number: WO 2019/043360 (07.03.2019 Gazette 2019/10)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 01.09.2017 GB 201714063 (71) Applicant: Trustonic Limited Cambridge CB1 2JD (GB)	(72) Inventors: LORESKAR, Chris Cambridge CB1 2JD (GB) DENT, John Cambridge CB1 2JD (GB) (74) Representative: D Young & Co LLP  120 Holborn London EC1N 2DY London EC1N 2DY (GB)